0
First, please forgive me the correction, but the Jurassic was not an era, but a geologic period of the Mesozoic era.
The Early Jurassic suffered a major extinction in the Triassic- Jurassic boundary.
Many archosaur species went extinct, as well as most of amphibia (except small size specimen). In the sea, all conodonts disappeared from fossil register.
Although dinosaurs, pterosaurs and ichthyosaurs were already present during the Triassic, this extintion gave the way to the reptilian gigantism of the Jurassic and the Cretaceous periods, along with bony fish gigantism, such as the largest know fish, the Leedsichthys.
The Jurassic was not a very peaceful period; besides the above major extintion, there were, at least, two other less serious - but nevertheles significative - extintions.
The supercontinent Pangea, the last supercontinent in the geologic history of our planet, began to broke apart, with intense vulcanism and earthquakes.
Earthquakes, even with magnitude 9 or above in the Richter scale, were not as dangerous as today, because there were no buildings, and they could cause regional landslides or, in the worst scenario, non-global topographic alterations.
So, during the Toarcian stage extintion, the sea fauna was hit more severely than the terrestrial fauna, with the total extintion of Ammonites, a long living cephalopod since the Devonian.
The Tithonian extintion was less severe, but the Atlantic Ocean was beeing formed with the tectonic plates mouvement and vulcanism, and the waters of the new ocean became anoxic, with the loss of marine biodversity.
About the flora in the Jurassic, it was dominated by conifers and, in a less extend, the gymnosperms. So, about the flora, no severe extintion occured.
Coralline algae, very important to coral reefs ecology, appeared for the first time.
Ferns, of course, kept abundant but the advent of flowers had to wait for the Cretaceous...
Some animals that became extinct during the Jurassic era include various marine reptiles like ichthyosaurs and pliosaurs. Plant species that went extinct during this time are harder to pinpoint, but there were likely some ferns and cycads that disappeared.
Add your answer:
Earn +20 pts
What evolved during the Jurassic or Cretaceous periods?
During the Jurassic and Cretaceous periods, dinosaurs continued to evolve and diversify, with the rise of giants like sauropods and theropods. Flight also evolved further in Pterosaurs and early birds, developing more specialized adaptations. Additionally, flowering plants became more widespread, leading to the evolution of new types of insects and other animals that fed on them.
Was Pangaea around in the Jurassic period?
Yes, Pangaea began to break apart during the Jurassic period, around 180 million years ago. This breakup eventually led to the formation of the continents as we know them today.
What dangerous dinosaurs were there in the Jurassic time period?
Some dangerous dinosaurs that lived during the Jurassic period include Allosaurus, a large predatory theropod dinosaur, as well as Ceratosaurus, Dilophosaurus, and Torvosaurus. These dinosaurs were apex predators and hunted other animals for food.
When did the dinosaurs became extingt?
Dinosaurs became extinct around 65 million years ago during the Cretaceous-Paleogene extinction event. It is believed that a combination of climate change, asteroid impact, and volcanic activity contributed to their extinction.
Where there any meteors during the Jurassic era?
Yes, there is evidence that suggests meteors did hit the Earth during the Jurassic era. Some scientists believe that a meteor impact may have contributed to the mass extinction event that marked the end of the Jurassic period.
Was there and ice age happening during the Jurassic Period?
The ice age began at the end of the Jurassic period, a theory of why the dinosaurs became extinct. <33
When did the megatherium live?
the megatherium went extinct about 8,000 years ago
When was the allosaurus born and extinct?
During the Jurassic period.
What happened to many land and sea animals during Paleozoic era?
Many of the animals began to die off and became extinct.
How long ago did dinosaurs live in the jurasic peirod?
Dinosaurs lived in the Jurassic Period over 145 to 200 million years ago. Dinosaurs became extinct during the Triassic period.
How did the hyenadon become extinct?
The hyenadon became extinct during the start of the Oligocene. There was a mas extinction event that was called Grande Coupure and causes temperatures to decline and killed many species of animals.
What was the dominant land animal during the Jurassic and cretaceous period?
The dinosaurs were the dominant land animals during the Jurassic and Cretaceous periods, rising to dominance during the late Triassic.
What are important Jurassic period events?
cute dinos went bye bye (:CommentDinosaurs went extinct on the C-T (Cretaceous/Tertiary) boundary. Not during the Jurassic Period.
How did pteranodon become extinct?
A pteranodon is a pterosaur, or a flying dinosaur. During the fall of the dinosaurs, all dinosaurs became extinct, including the pterosaurs.
Organisms that diversified during the Jurassic period?
Several organisms diversified during the Jurassic period. Crocodiles became larger and more diverse. Dinosaurs and birds diversified and thrived. Of all the organisms in the Jurassic Period, plants diversified the most.
Witch group of giant animals once lived during the triassic and Jurassic peridos?
Dinosaurs
Which group of giants once lived during the triassic and Jurassic periods?
Dinosaurs were the giant animals that once lived during the Triassic and Jurassic periods. I hope this answer helped you even though it was a fairly simple question!
